Siemens SINAMICS G150, Руководство по эксплуатации

Страница: 72 / 240

Electrical Installation 11/03
SINAMICS G150
4-40
Operating Manual
4.9.13 Insulation Monitor (Option L87))
Description
This device monitors the complete electrically connected circuit for insulation faults.
The insulation resistance as well as all the insulation faults that occur in the DC link
and on the motor side of the cabinet are detected. Two response values (between
1 k
Ω
...10 M
Ω
) can be set. If a response value in undershot, a warning is output to
the terminal. A system fault is output via the signaling relay system.
When the cabinet unit is delivered from the plant, the plant configuration (one or
several loads in one electrically connected network) and the protection philosophy
(immediate shutdown in the event of an insulation fault or restricted continued
motion) can vary. This means that the signaling relays of the insulation monitor are
not integrated in the fault and warning train. These relay outputs would have to be
integrated in the fault/warning train of the cabinet unit on the system side providing
the plant configuration and protection philosophy permit this.
IMPORTANT
Only one insulation monitor can be used in an electrically connected network.
Connection
Table 4-33 Terminal block A1-A101 – connection for one insulation monitor
Terminal Technical data
11 Signaling relay ALARM 1 (mid-position contact)
12 Signaling relay ALARM 1 (NC contact)
14 Signaling relay ALARM 1 (NO contact)
21 Signaling relay ALARM 2 (mid-position contact)
22 Signaling relay ALARM 2 (NC contact)
24 Signaling relay ALARM 2 (NO contact)
M+ External k
Ω
display, analog output (0
µ
A ... 400
µ
A)
M- External k
Ω
display, analog output (0
µ
A ... 400
µ
A)
R1 External reset key (NC contact or wire jumper otherwise the fault code is not stored)
R2 External reset key (NC contact or wire jumper)
T1 External test button
T2 External test button
Max. connectable cross-section: max. 2.5 mm² (AWG 12)
Diagnostics
Messages output during operation and in the event of faults (meaning of LEDs) are
described in "Additional Operating Instructions" in the operating manual.
„